CMake patches for QNX Support (#178)

Patches to support building Starling on QNX

---------

Co-authored-by: Christian Reimer <christian.reimer@swift-nav.com>

.cmake-format.yaml

@@ -54,7 +54,7 @@ lint:
   max_branches: 40 # Default target: 12
   max_arguments: 6 # Default target: 5
   max_localvars: 15
-  max_statements: 125 # Default target: 50
+  max_statements: 130 # Default target: 50
 encode:
   emit_byteorder_mark: false
   input_encoding: utf-8

CompileOptions.cmake

@@ -135,6 +135,10 @@ function(swift_set_compile_options)
     endif()
   endif()
 
+  if(CMAKE_SYSTEM_NAME MATCHES "QNX")
+    list(APPEND all_flags -D_QNX_SOURCE)
+  endif ()
+
   list(APPEND all_flags
        -Wall
        -Wcast-align

TestTargets.cmake

@@ -299,6 +299,9 @@ function(swift_add_test target)
   endif()
   if(x_LINK)
     target_link_libraries(${target} PRIVATE ${x_LINK})
+    if(CMAKE_SYSTEM_NAME MATCHES "QNX")
+      target_link_libraries(${target} PRIVATE regex)
+    endif ()
   endif()
 
   if (NOT ${PROJECT_NAME}_BUILD_TESTS)